This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 29 |
| 3 | 147 |
| 4 | 794 |
| 5 | 4074 |
| 6 | 18808 |
| 7 | 77320 |
| 8 | 285494 |
| 9 | 959672 |
| 10 | 2975483 |
| 11 | 8605341 |
| 12 | 23428725 |
| 13 | 60497931 |
| 14 | 149066593 |
| 15 | 352233950 |
| 16 | 801471439 |
| 17 | 1762213254 |
| 18 | 3755124007 |
| 19 | 7774777259 |
| 20 | 15675004492 |
| 21 | 30833594755 |
| 22 | 59276323572 |
| 23 | 111542905766 |
| 24 | 205731574732 |